1836716837221 has 16 divisors (see below), whose sum is σ = 2143859120640. Its totient is φ = 1540765981440.

The previous prime is 1836716837149. The next prime is 1836716837233. The reversal of 1836716837221 is 1227386176381.

It is not a de Polignac number, because 1836716837221 - 2⁷ = 1836716837093 is a prime.

It is a super-2 number, since 2×1836716837221² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1836716837821) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8456301 + ... + 8670781.

It is an arithmetic number, because the mean of its divisors is an integer number (133991195040).

Almost surely, 2^{1836716837221} is an apocalyptic number.

It is an amenable number.

1836716837221 is a deficient number, since it is larger than the sum of its proper divisors (307142283419).

1836716837221 is a wasteful number, since it uses less digits than its factorization.

1836716837221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 240564.

The product of its digits is 4064256, while the sum is 55.

The spelling of 1836716837221 in words is "one trillion, eight hundred thirty-six billion, seven hundred sixteen million, eight hundred thirty-seven thousand, two hundred twenty-one".